<section id="nav-header">
  <h3>Hi.</h3>
  <a href="/">
    {% if site.data.theme.icon %}
    <img src="{{ site.data.theme.icon }}" id="avatar" alt="My photo" />
    {% elsif site.data.theme.social.gravatar %}
    <img src="http://www.gravatar.com/avatar/{{ site.data.theme.social.gravatar }}?s=200" id="gravatar"
      alt="My photo" />
    {% else %}
    <img src="/logo.png" id="logo" alt="Blog logo" />
    {% endif %}
  </a>
  <h5>I'm <a href="/">{{ site.data.theme.name }}</a>.</h5>
</section>